Beautiful, but technically not a sketch. Sketches by nature are not detailed, and these are very detailed - strands of hair, holes in lace, flower petals. These could be considered studies, concepts or even drawings. Not a sketch.
I know people expect you to draw perfect, but for the creative process more people need to understand what a sketch is. Many people pay for a sketch and get a drawing, this hurts artists who are expected to spend more time then they are paid due to misconstrued expectations from commissioner. So help yourself out and only label something a sketch if it's very quick and lacking much detail. Even if this took you 2 seconds it deserves to be classified as a drawing, study or concept. As I said they are beautiful.